[True_Moose]

Stonefire and Frostreaver is what I'm assuming you're saying for SoA. If you want the AoU in the main hand, Crom Faeyr is your best bet. Don't forget you also get several attacks with your main hand which are made better by Crom Faeyr. FoA should stay in the mainhand if possible, so I would advise CF.

BUT how about a different tact?

Axe of the Unyielding in the off-hand with Flail of Ages in the main hand. Just a thought. This gives you tons of damage in the main hand, plus you get the con, AC and regen bonuses from the Axe. By the time you get it, the Vorpal effect isn't the most wondrous thing in the world anyways.